Hi, I'm a long time connoisseur but brand new grower. This is my very first grow and until two days ago everything was going amazing. I started from seed Lowryder 2 got ten, germed 8. Then moved to dixie cups 18/6 lighting 2 (24w) cfls watered tiny amounts daily (distilled water). I'm growing in a tuberware container positioned vertically so I have about a foot and a half of vertical space. I also have to computer fans (12v) running my intake and exhaust, not to mention the homemade carbon filter which covers the exhaust fan. I used organic EB potting soil, and sterilized it in the oven at 140 degrees F for thirty minutes. The local nursery owner told me this would sterilize the soil without killing all the mycrohzae sp? After about a week and a half I transplanted to 6 inch terra cotta pots and put a small amount (recommend by the box) of organic tomato fert. Which just so happened to have a similar chemical makeup to that of most marijuana ferts. A Week after that, about three days ago I noticed yellowing on some of my plants not all. As a new time grower I freaked out and didn't know what to do. I have absolutely no idea what the **** is happening so PLEASE if anyone thinks they know anything about this PLEASE give me everything you've got. THANK YOU!